<template>
    <p>父组件当前的值为：{{ number }}</p>
    <CustomSubComponent @updateCount="updateEmitCount"/>
</template>
<script setup lang="ts">
import CustomSubComponent from './CustomSubComponent.vue';
import {ref} from 'vue'
const number =ref(10)
const updateEmitCount =(value) =>{
    number.value += value
}
</script>
